Finding the Third Proportional to 2,558.81 and 5,511.94

Step by Step Solution

1. Step 1: Write the proportion equation
   2,558.81 : 5,511.94 = 5,511.94 : x
2. Step 2: Convert to fraction form
   2,558.81/5,511.94 = 5,511.94/x
3. Step 3: Cross multiply
   2,558.81x = 5,511.94 × 5,511.94
4. Step 4: Simplify right side
   2,558.81x = 30,381,455.00
5. Step 5: Solve for x
   x = 30,381,455.00/2,558.81
6. Step 6: Final answer
   x = 11,873.26